I use a Cabela's camo gore tex jacket. Not sure if its a squaltex, bone dry or instinct but it works perfect. Not expensive, stood up to a few safaris so far, both thorns and cold. Can use at home, cheap enough so a rip or loss in Africa is not heart breaking and most of all it works. Not insulated, just a shell with lots of pockets, on cold mornings I wear a fleece under it and over my hunting shirt. Never usually hike/hunt/track in it, the fleece has always been enough. I am Canadian so used to cold not Africa "chilly". We had snow on safari in 2021 and jacket worked perfect. I always ride on back seat while on safari so more important is the fact that this jacket is windproof, keeps the wind out fully.
MB